1. Department of Gastroenterology, Medical School of National and Kapodistrian University of Athens Laiko General Hospital Athens Greece
2. Institute of Liver and Digestive Health University College of London London UK
3. Department of Hygiene and Epidemiology Medical School of National and Kapodistrian University of Athens Athens Greece
4. 2nd Department of Internal Medicine, National and Kapodistrian University of Athens School of Health Sciences General Hospital of Athens “Hippokratio” Athens Greece
5. Department of Medicine and Research Laboratory of Internal Medicine Thessaly University Medical School Larissa Greece
6. INSERM U1052 – Cancer Research Center of Lyon (CRCL) Lyon France